Yup, more Accel World AMV. Got the idea after perusing pixiv.net. The doujin writers are pairing Haru with Taku. タクハル or ハルタク. Well, what would be better than using the song Super Drive, the OP theme of the classic anime, Gravitation. ^_^ Enter Gravi World!
Taku knew that Chiyu like Haru, but what if the reason that Taku decided to confess to Chiyu was not because he like Chiyu, but to prevent Chiyu going out with Haru? 😀 Anyway, I got the images at the end from pixiv.net. One, Two, and Three. Word of caution though, there are plenty of NSFW image in pixiv.net, so tread carefully.
Just for comparison, this is the original Gravitation OP.